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可以使用不同的非线性晶体在远红外区获得两台CO2激光器的差频振荡。ZnGeP2晶体的特点是不需要低温和磁场，而已在红外区及远红外区的吸收较小。该文研究了高功率脉冲CO2激光器的辐射在ZnGeP2晶体中的差频。图1ZnGeP3的折射率n0(a)吸收系数。a0(5)与辐射波长的关系图2ZnGeP3的
Different non-linear crystals can be used to obtain the difference frequency oscillations of the two CO2 lasers in the far-infrared region. ZnGeP2 crystals are characterized by the absence of low temperature and magnetic fields, and less absorption in the infrared and far-infrared regions. In this paper, we study the difference frequency of ZnGeP2 crystals irradiated by high power pulsed CO2 laser. Figure 1ZnGeP3 refractive index n0 (a) absorption coefficient. a0 (5) and the relationship between the wavelength of radiation Figure 2ZnGeP3